Over the past day and a half, I've worked on generating our own in-house thumbshots service, instead of relying on the commercial product at thumbshots.com for the website screenshots seen when hovering over links and in member profiles. Doing so will save us $500 a month, so that's good news :)
Unfortunately, the alternative to spending the money to outsource the service means a lot more stress and overhead on our own servers. We're currently working on building up a screenshot library, so please excuse the 'Thumbshot Coming Soon' messages that are quite prevalent now. It should be just another day or so before we have most websites captured.
In the meantime, it seems like on average once a particular website screenshot is requested at least 4 or 5 times (even refreshing the page works), it will be queued and ready about ten minutes later.